We are accustomed to thinking of World War II, at least in Europe, as "Hitler's war." In Stalin's War (Basic Books, 2021), Sean McMeekin, Professor of History at Bard College and the author of The Russian Origins of World War I, suggests that we shift our thinking further east. The Stalin who emerges from McMeekin's well-written and researched pages is a brutal tyrant playing a long game. He knew his 1939 Non-Aggression Pact with Hitler to partition Poland would lead to war between Germany and the West, something he wanted. Behind the facade of this "devil's alliance," he was planning to attack Hitler when Hitler attacked him first. Forced into alliances with the U.S and U.K., he received Western military assistance, but gave nothing in return. He played upon the delusions Churchill and FDR held about him, while planning a post-war world different from theirs. The Russian terror he imposed over vast swaths of Europe and Asia proved to be no less severe than the Nazi and Japanese versions. McMeeken argues that World War II was instigated by the Russians, who emerged from it as its greatest victor.